diff options
| -rw-r--r-- | src/mesa/pipe/tgsi/mesa/mesa_to_tgsi.c | 78 |
1 files changed, 77 insertions, 1 deletions
diff --git a/src/mesa/pipe/tgsi/mesa/mesa_to_tgsi.c b/src/mesa/pipe/tgsi/mesa/mesa_to_tgsi.c index 66b8db07f9..750314fb43 100644 --- a/src/mesa/pipe/tgsi/mesa/mesa_to_tgsi.c +++ b/src/mesa/pipe/tgsi/mesa/mesa_to_tgsi.c @@ -498,6 +498,54 @@ make_output_decl( }
+static struct tgsi_full_declaration
+make_temp_decl(GLuint index)
+{
+ struct tgsi_full_declaration decl;
+ decl = tgsi_default_full_declaration();
+ decl.Declaration.File = TGSI_FILE_TEMPORARY;
+ decl.Declaration.Declare = TGSI_DECLARE_RANGE;
+ decl.u.DeclarationRange.First = index;
+ decl.u.DeclarationRange.Last = index;
+ return decl;
+}
+
+
+/**
+ * Find the temporaries which are used in the given program.
+ * Put the indices of the temporaries in 'tempsUsed'.
+ * \return number of temporaries used
+ */
+static GLuint
+find_temporaries(const struct gl_program *program,
+ GLuint tempsUsed[MAX_PROGRAM_TEMPS])
+{
+ GLuint i, j, count;
+
+ for (i = 0; i < MAX_PROGRAM_TEMPS; i++)
+ tempsUsed[i] = GL_FALSE;
+
+ for (i = 0; i < program->NumInstructions; i++) {
+ const struct prog_instruction *inst = program->Instructions + i;
+ const GLuint n = _mesa_num_inst_src_regs( inst->Opcode );
+ for (j = 0; j < n; j++) {
+ if (inst->SrcReg[j].File == PROGRAM_TEMPORARY)
+ tempsUsed[inst->SrcReg[j].Index] = GL_TRUE;
+ if (inst->DstReg.File == PROGRAM_TEMPORARY)
+ tempsUsed[inst->DstReg.Index] = GL_TRUE;
+ }
+ }
+
+ /* convert flags to list of indices */
+ count = 0;
+ for (i = 0; i < MAX_PROGRAM_TEMPS; i++) {
+ if (tempsUsed[i])
+ tempsUsed[count++] = i;
+ }
+ return count;
+}
+
+
/**
* Convert Mesa fragment program to TGSI format.
* \param inputMapping maps Mesa fragment program inputs to TGSI generic
@@ -527,7 +575,6 @@ tgsi_mesa_compile_fp_program( GLuint ti; /* token index */
struct tgsi_header *header;
struct tgsi_processor *processor;
- struct tgsi_full_declaration fulldecl;
struct tgsi_full_instruction fullinst;
GLuint preamble_size = 0;
@@ -542,6 +589,7 @@ tgsi_mesa_compile_fp_program( ti = 3;
for (i = 0; i < numInputs; i++) {
+ struct tgsi_full_declaration fulldecl;
switch (inputSemanticName[i]) {
case TGSI_SEMANTIC_POSITION:
/* Fragment XY pos */
@@ -584,6 +632,7 @@ tgsi_mesa_compile_fp_program( * Declare output attributes.
*/
for (i = 0; i < numOutputs; i++) {
+ struct tgsi_full_declaration fulldecl;
switch (outputSemanticName[i]) {
case TGSI_SEMANTIC_POSITION:
fulldecl = make_output_decl(i,
@@ -610,6 +659,20 @@ tgsi_mesa_compile_fp_program( }
}
+ {
+ GLuint tempsUsed[MAX_PROGRAM_TEMPS];
+ uint numTemps = find_temporaries(&program->Base, tempsUsed);
+ for (i = 0; i < numTemps; i++) {
+ struct tgsi_full_declaration fulldecl;
+ fulldecl = make_temp_decl(tempsUsed[i]);
+ ti += tgsi_build_full_declaration(
+ &fulldecl,
+ &tokens[ti],
+ header,
+ maxTokens - ti );
+ }
+ }
+
/*
* Copy fragment z if the shader does not write it.
*/
@@ -714,6 +777,19 @@ tgsi_mesa_compile_vp_program( maxTokens - ti );
}
+ {
+ GLuint tempsUsed[MAX_PROGRAM_TEMPS];
+ uint numTemps = find_temporaries(&program->Base, tempsUsed);
+ for (i = 0; i < numTemps; i++) {
+ struct tgsi_full_declaration fulldecl;
+ fulldecl = make_temp_decl(tempsUsed[i]);
+ ti += tgsi_build_full_declaration(
+ &fulldecl,
+ &tokens[ti],
+ header,
+ maxTokens - ti );
+ }
+ }
for( i = 0; i < program->Base.NumInstructions; i++ ) {
compile_instruction(
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